This is it for me. It is so tempting, because he's a Colossus but if you spunk a large chunk of your budget into his deal and then he goes down injured. You're screwed in his position and you've presumably also compromised on quality all over the pitch as well. You're not going to get anywhere close to signing anyone of his physical presence but you might get a younger, fitter, cheaper option, with room to grow and develop, and with resale value.
I'm not letting myself get my hopes up around this one. As others have said, if West Ham then make a move, it's all over anyway.